Printing-press.



No. 633,616. Patented Sept. 26, I899..

W. SCOTT.

PRINTING PRESS.

(Application filed Apr. 7, 1897.) (Ho Model.) 3 Sheets-Sheet l.

WITNESSES:

B iris flitamey No. 633,6|6. Patented Sept. 26, $899.

w. SCOTT.

PRINTING PRESS.

(Application filed Apr. 7, 1897.) {No Model.) 3 Sheets-Sheet 2,

WITNESSES: INVENT R:

/gg By his Aftomey M W W @a/vfl no: n'onms PETERS co. wcn'o-uruon WAsN NGTDN, my C.

N0. 633,6l6. Patented Sept. 26, I899.

W. SCOTT.

PRINTING PRESS.

{Application filed Apr. 7, 1897. 2N0 Model.) 3 Sheais-Sheet 3.

WITNESSES: V I 7 INVENTOR:

@M /W M UNITED STATES PATENT OFFICE.

VALTER SCOTT, OF PLAINFIELD, NE\V JERSEY.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 633,616, dated September 26, 1899. Applica n fil April 7, 1897. Serial No, 631,090. (No'modeL) To all whom it may concern:

Be it known that I, VVALTER SCOTT, a citizen of the United States, and a resident of Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Printing-Presses, of which the following is a specification.

This invention relates in part to mechanism for securing proper register of the bed and cylinder in that class of machines commonly known as bed and cylinder presses.

The object of this invention in so far as it relates to the register mechanism is to have control of the rack at all times, so that it will not be possible to even accidentally displace the rack and so cause damage to the machine.

Another object is to cause the bed and cylinder to move at the same speed at the moment when the register mechanism engages.

Other objects will develop as the description of the invention progresses.

To these ends the invention includes the combination of the type-bed and the impression-cylinder with a register gear or segment connected to the cylinder, a rack on the bed and movable relatively thereto, and mechan ism on the framework of the machine continuously engaged with and controlling the said movement of the rack relatively to the bed.

The invention also includes the combination, with a rack and pinion bed-motion, of a bearing-bar on the rack, and a thrust-taker on the framework ooacting with said bar at ornear where the pinion meshes with the rack.

The invention also includes the combina tion, with the bed and the cylinder, of brake mechanism which coacts with the bed and cylinder just before the impressions begin or .just before the bed and cylinder registering mechanism engages.

The invention also includes other features, as will hereinafter more fully appear, all the features of the invention being more particularly set forth in the claims concluding this specification.

The preferred form of the invention is shown in the accompanying drawings, forming part hereof, in which- Figure 1 is a partial side elevation of a machine embodying the invention, showing the brakes for the bed and the cylinder, the reg ister rack and gear or segment, and the operating mechanism. Fig. 2 is an end View from the right of Fig. 1, showing the same parts as that figure. Fig. 2 is an end View showing the register mechanism in a different position. Figs. 3 and at are views from the end of the machine of a modification of the register mechanism in different positions.

The invention for convenience is shown in connection with a continuously revolving cylinder-press.

The reference-letter F marks the frame work for supporting the working parts of the apparatus.

The letter 0 indicates the impression-cylinder, which is journaled in the boxes B, which have a rising-and-falling motion in the case shown, this rising-and-falling motion being obtained by usual or suitable means. In the case of a stop-cylinder press this risingand-falling motion may be dispensed with, other means for preventing contact between the bed and cylinder during the return of the former being used. The cylinder 0 is driven from the shaft 10 by the train of pinions 11, 6, and 7, which are indicated by their pitchlines only in Fig. 1.

The form-carrying bed T is suitablyguided on the frame F and is driven in any suitable manner, as by the mangle-rack R, carried by brackets z, rigid with and extending downwardly from the bed, the rack extending hori- Zontally, the pinion P, which engages with the rack R, the pinion 17 on the same shaft as pinion P, the intermediate pinion 8, the driver-pinion 9, shaft 10, and pinion 11 on shaft 10, which is in mesh with the pinion 6. The pinions P, 17, and 8 are borne by and journaled in a frame 12, which is itself journaled on the shaft 10. The weight of the pinions and frame is suitably counterbalanced, as by the spring 13, which surrounds the rod let and bears against a collar 15 thereon and against the frame F, the said rod being pivotally jointed to arm 16 of the frame 12. in my pending application for Letters Patent, filed on the 17th day of January, 1894, Serial No. 497,153.

The bed is provided with a rack 18 at one side thereof, which rack is pivoted atits ends to the bed, so as to be capable of a rocking motion on an axis parallel to the direction of This bed-motion is described and claimed,

motion of the bed, as by the journals 19 in suitable bearings 20 on the bed T. The rack 13 is preferably made adjustable longitudinally, as by means of the screws or screwbolts a, which engage with sci-ewtlireaded openings in the bearings 20 and bear against the ends of the journals 10. The last are of such length that the rack 18 can have endwise movement sufficient. for the purposes in view. This adjustability of the rack 13 is useful in securing accurate register of the gear on the cylinder with the rack; also, in compensating for wear of the driving mechanism for the bed and the cylinder of the press. The cylinder is provided with a segment-gear 21, which is in the vertical plane through the journals of the rack 18 and coacts with the said rack to cause equal motion of the bed and cylinder during the taking of the impressions, thus compensating for any wear or lost motion in the gearing by which the bed and the cylinder are driven. In the case of the continuously-revolving cylinder it is necessary that the segment 21 should pass the rack 18 during the return stroke of the bed without touching it. This has been done heretofore by simply having the rack 18 movable into and out of position for coaction with the segment 21. To move the rack into such positions, the prior construction above referred to provides mechanism which acts on the rack at or near the extremes of the motion of the bed T and which exercises no control over or action upon the rack 18 at other times. By my improved construction the possibility of breakage is avoided absolutely, in that the rack 18 is at all times under the control of its operating mechanism and cannot get out of place or be so placed accidentally. Thelattercontingencyisnever absent from the prior construction.

In the preferred form of my invention the rack 18is pivoted and is provided with a clownwardly-extending arm 22, which is provided with an antifriction-roller The frame F is provided with a rock-shaft 24, extending longitudinally thereof and provided with arms 25, extending upwardly therefrom. These arms are provided with or carry the slot-bar 26, between the walls of which the roller 23 is at all times confined and by which it is controlled. The shaft 24 is also provided with an arm 27, extending downwardly therefrom and provided with an antifriction-roller 28, which engages in the groove-cam 29 on the shaft 2, which is driven from the shaft 10 by the train of gears 11, 6, 5, 4:, and 3, all indicated in Fig. 1 by their pitch-circles only. The proportions of this train of gearing are such that the cam 29 makes one turn to one complete motion to and fro of the bed T. The cam 29 is shaped to move and retain the rack 18 in one position during the motion of the bed in one direction and to move and retain it in the-other of its two positions during the motion of the bed in the other direction. Thus the rack 18 is in position for coaction with the segment 21 during the forward or printing stroke of the bed and is out of line therewith during the return or non-printing stroke of the bed. An open cam in place of closed cam 29 may be used,a strong'spring being employed to keep arm 27in contact with the cam.

In order to insure that the bed and cylinder shall be moving at the same speed at the moment when the rack 18 and the segment 21 come into mesh with each other, I provide a brake mechanism which coacts simultaneously with each of these parts to bring them to a uniform speed. A bent or bell lever 30 is pivoted at its angle on the frame at a convenient point, as 31, and is provided with two brake surfacesor shoes 32 33, respectively, for coaction with the bed T and the cylinder 0. The lever 30 is conveniently operated from the shaft 2 by a cam 34 thereon, against which a roller 35 on the lever bears.

The rack B may be stiffened against side I thrust by means of the roller 36, which is journaled on the arm 37 of the bar 38 of the frame F, therack being provided with a bearingbar 39 for coaction with the roller. The roller 36 is located opposite the gear P, which drives the rack R.

In Figs. 3 and a I show a modification of the. rack-operatin g devices, in which the slotbar 26 slides upon and is guided by the frame F transversely of the machine, as under and by the bars 40. (See Fig. 3.) The arms 25 instead of carrying the bar 26 are provided with toothed gears ll, which mesh with the racks 4.2 on the under side of the bar 26. The

other parts are the same as shown in Figs. 1

and 2 and are as above described.

It is to be understood that while I have de scribed the preferred form of my invention I do not limit my claims to the same, for many changes, inversions, and rearrangements may be made without departing from the spirit of my invention.

That I claim is 1. In a printing-press, the combination with the bed and the cylinder of brake mechanism for coaction with the bed and cylinder just before the impressions begin, substantially as described.

2. In a printing-press, the combination of the bed, the cylinder, a segment-gear on the cylinder, a rack on the bed for meshing with said segment at times, and brake mechanism for coaction with the bed and the cylinder for equalizing the speeds of the bed and cylinder as the segment and rack come into mesh, substantially as described.

3. In a printing-press, the combination of the bed and cylinder, the register-gear connected to the cylinder, the rack movable on the bed and coacting with the gear, and mechanism on the framework and continuously in control of the rack for moving the rack into and out of position for coaction with the gear or segment, substantially as described.

4.. In a printing-press, the combination with the bed and cylinder, the register-gear connected to the cylinder, the register-rack movable on the bed for coaction with the gear in securing register of the bed and cylinder during impressions, the cam 29, the slot-bar 26 operated by the cam, and the arm 22 on the rack and extending into and controlled by the said slot-bar, substantially as described.

5. In a printing-press, the combination of the bed and cylinder, the register-gear connected to the cylinder, the rack movable on the bed into and out of position for coaction with the said gear for securing register of the bed and cylinder during impressions, the rock-shaft 24, the slot-bar 26 operated by the shaftand the arm 22 on the rack and extending into the slot-bar and controlled thereby, substantially as described.

6. In aprinting-press, the combination with the bed and cylinder,a register-gear connected to the cylinder, the register-rack movable on the bed into and out of position for coaction with the said gear, and mechanism containing a slot-bar and arm continuouslyin connection for so moving said rack, substantially as described.

7. In a printing-press, the combination of the independently-driven bed and cylinder, the lever 30, the two brake-surfaces thereon for coaction with the bed and the cylinder, and the cam for actuating the lever, substantially as described.

8. In a printing-press, the combination with the impression-cylinder and a register-gear connected thereto, of the bed provided with a register-rack movable into and out of position for coaction with said gear, and a camoperated slot-bar connected with said rack, whereby the said rack is under control at all times, substantially as described.

9. In aprinting-press, the combination with the impression-cylinder and a register-gear connected therewith, of the bed provided with a register-rack movable into and out of position for coaction with the said gear, a slot-bar not carried by said bed and continuously connected with and controlling the said rack, and means for moving the slot-bar to and fro transversely of the machine, substantially as described.

10. In a printing-press, the combination with the impression-cylinder and a registergear connected therewith, of the bed provided with a rack movable into and out of position for coaction with said gear, a rock-shaft on the framework of the machine, a slot-bar continuously connected with and controlling the rack, and arms on said shaft to which the slotbar is secured, substantially as described.

11. In a register mechanism for printingpresses, the combination of the bed, a register-rack pivoted thereon to rock about a longitudinal axis, means for adjusting said rack longitudinally, and a register gear or segment connected to the cylinder and coacting with the said rack,.substantially as described.

12. In a register mechanism for printingpresses, the combination of a bed, a register rack thereon provided with journals, bearings for said journals, adj usting-screws independent of said bearin gs and coactin g with the ends of said journals, and a register gear or segment connected to the cylinder and coacting with said rack, substantially as described.

Signed at New York city, in the county of New York and State of New York, this 1st day of April, A. D. 1897.

\VALTER SCOTT.

WVitnesses:

CHAS. A. BRODEK, RICHARD W. BARKLEY. 

